All 225 Calculators & Tools
The complete directory of every free calculator and converter on Calculator Hub Pro, organized by category.
Biology Calculators
Genetics, Cells & Biological Calculators
Chemistry Calculators
Molar Mass, pH & Chemical Calculations
Construction Calculators
Concrete, Flooring & Construction Tools
Conversion Calculators
Unit Converters for Length, Weight, Temperature
- months-to-years
- years-to-months
- days-to-years
- years-to-days
- weeks-to-days
- days-to-weeks
- hours-to-minutes
- minutes-to-hours
- minutes-to-seconds
- seconds-to-minutes
- meters-to-feet
- feet-to-meters
- kilometers-to-miles
- miles-to-kilometers
- centimeters-to-inches
- inches-to-centimeters
- millimeters-to-inches
- inches-to-millimeters
- yards-to-meters
- meters-to-yards
- nautical-miles-to-kilometers
- kilometers-to-nautical-miles
- micrometers-to-millimeters
- kilograms-to-pounds
- pounds-to-kilograms
- grams-to-ounces
- ounces-to-grams
- stones-to-pounds
- pounds-to-stones
- metric-tonnes-to-kilograms
- kilograms-to-metric-tonnes
- carats-to-grams
- grams-to-carats
- milligrams-to-grams
- grams-to-milligrams
- cubic-meters-to-cubic-feet
- cubic-feet-to-cubic-meters
- acres-to-square-feet
- square-feet-to-acres
- liters-to-gallons
- gallons-to-liters
- milliliters-to-cups
- cups-to-milliliters
- teaspoons-to-milliliters
- milliliters-to-teaspoons
- tablespoons-to-milliliters
- milliliters-to-tablespoons
- fluid-ounces-to-milliliters
- milliliters-to-fluid-ounces
- pints-to-liters
- liters-to-pints
- pints-to-milliliters
- pints-to-ounces
- pints-to-gallons
- liter-to-quart
- quarts-to-liters
- gigabytes-to-megabytes
- megabytes-to-gigabytes
- megabytes-to-kilobytes
- kilobytes-to-megabytes
- terabytes-to-gigabytes
- gigabytes-to-terabytes
- petabytes-to-terabytes
- terabytes-to-petabytes
- bits-to-bytes
- bytes-to-bits
- kilometers-per-hour-to-miles-per-hour
- miles-per-hour-to-kilometers-per-hour
- knots-to-mph
- mph-to-knots
- knots-to-kph
- square-meters-to-square-feet
- square-feet-to-square-meters
- acres-to-hectares
- hectares-to-acres
- square-miles-to-square-kilometers
- square-inches-to-square-feet
- square-feet-to-square-inches
- square-yards-to-square-meters
- horsepower-to-kilowatts
- kilowatts-to-horsepower
- joules-to-calories
- calories-to-joules
- bar-to-psi
- psi-to-bar
- pascal-to-bar
- atmospheres-to-pascals
- degrees-to-radians
- radians-to-degrees
- gradians-to-degrees
- newtons-to-dynes
- gram-force-to-newtons
- mpg-us-to-kml
- kml-to-mpg-us
- hertz-to-kilohertz
- kilohertz-to-hertz
- megahertz-to-hertz
- gigahertz-to-hertz
- watts-to-kilowatts
- kilowatts-to-watts
- lux-to-foot-candles
- foot-candles-to-lux
- gray-to-rad
- rad-to-gray
- sievert-to-rem
- rem-to-sievert
- mach-to-kph
- kph-to-mach
- pascal-to-kilopascal
- celsius-to-fahrenheit
- kelvin-to-celsius
- kelvin-to-fahrenheit
Ecology Calculators
Environmental & Nature Calculators
Education Calculators
GPA, Grade & Academic Tools
Everyday Life Calculators
Time, Date & Daily Life Calculators
Finance Calculators
Loans, Interest, & Money Management
Food Calculators
Cooking, Nutrition & Food Calculators
Gaming Calculators
FPS, DPI & Gaming Performance Tools
Health Calculators
BMI, Calories, & Fitness Calculators
- Chipotle Nutrition Calculator
- Starbucks Calorie Calculator
- ABV (Alcohol by Volume) Calculator
- Chronological Age Calculator
- Creatinine Clearance (CrCl) Calculator
- Corrected Calcium Calculator
- Drug Half-Life Calculator
- EtG Alcohol Calculator
- FFMI Calculator
- Army Body Fat Calculator
- ACFT Score Calculator
- Child Height Predictor
- Dog Years Calculator
- Puppy Weight Predictor
- Dog BMI Calculator
- Pregnancy Due Date Calculator
- IVF Due Date Calculator (3-Day & 5-Day Transfer)
- Period Calculator & Ovulation Predictor (Next Period + Fertile Window)
- Gestational Age Calculator: Weeks Pregnant by LMP, Due Date & Ultrasound (CRL)
Logistics Calculators
Shipping, Freight & Logistics Tools
Math Calculators
Algebra, Geometry, & Advanced Mathematics
- Square Root Calculator
- Cube Root Calculator
- Logarithm Calculator (Log)
- Slope Intercept Form Calculator
- Midpoint Calculator
- Cross Product Calculator
- Mean Median Mode Calculator
- Standard Deviation Calculator
- IQR (Interquartile Range) Calculator
- Weighted Grade Calculator
- Area of a Circle Calculator
- Surface Area Calculator (Box)
- Pythagorean Theorem Calculator
- Remainder Calculator
- Rounding Calculator
- Percentage Error Calculator
- Fraction to Decimal
- Decimal to Fraction
Other Calculators
Miscellaneous & Specialized Utilities
Physics Calculators
Force, Motion, & Energy Calculations
Sports Calculators
Scores, Performance & Sports Calculators
Statistics Calculators
Probability, Data & Statistical Analysis